A federal government research scientist says the same pesticide that is harming honey bees may be behind declining populations of some species of hummingbirds.
Christine Bishop says researchers have found a relatively high level of pesticide exposure from tests of droppings from the rufous hummingbird.
Health Canada is re-evaluating the use of an insecticide used on a large number of agricultural crops as well as a flea and tick pet treatment.
It says it will consider Bishop's information.